title: CCT- and CRI-tuning of white light-emitting diodes using three-dimensional non-close-packed colloidal photonic crystals with photonic stop-bands.
abstract: This study exhibited the correlated color temperature (CCT)- and color-rendering index (CRI)-tuning behavior of light emission from white light-emitting diodes (WLEDs) using three-dimensional non-close-packed (3D NCP) colloidal photonic crystals (CPhCs). The CCT of approximately 5300 K (characteristic of cold WLEDs) of white light propagated through the NCP CPhCs dropped to 3000 K (characteristic of warm WLEDs) because of the photonic stop-bands based on the photonic band structures of NCP CPhCs. This study successfully developed a novel technique that introduces lower-cost CCT- and CRI-tuning cold WLEDs with a CRI of over 90 that of warm WLEDs by using 3D NCP CPhCs.
authors.forename: Chun-Feng
authors.initials: CF
authors.lastname: Lai
authors.forename: Chung-Chieh
authors.initials: CC
authors.lastname: Chang
authors.forename: Ming-Jye
authors.initials: MJ
authors.lastname: Wang
authors.forename: Mau-Kuen
authors.initials: MK
authors.lastname: Wu